What was found
(CAN) THE LEFT HAND ENGINE MADE NOISE AND VIBRATION PRIOR TO TAKE OFF. THE PILOT RETURNED TO FBO. IT WAS SUGGESTED TO BORESCOPE BOTH ENGINES FOR CARBON BUILD UP AND HPT VANE CARBON BLOCKAGE.
As reported to the FAA. Reports are unverified, and codes are left as the FAA publishes them.
(CAN) THE LEFT HAND ENGINE MADE NOISE AND VIBRATION PRIOR TO TAKE OFF. THE PILOT RETURNED TO FBO. IT WAS SUGGESTED TO BORESCOPE BOTH ENGINES FOR CARBON BUILD UP AND HPT VANE CARBON BLOCKAGE.